区别：many只能修饰可数名词的复数；a lot of既可以修饰可数名词，也可以修饰不可数名词。a lot of可以修饰比较级，而many不可以。a lot of可以用以简略回答，而many不可以。

二者区别

1.many和much一组，前者加可数名词后者修饰不可数名词；如many fruits，so much money。另much可修饰比较级如much better。

2.lots of和a lot of一组，既可修饰可数名词也可修饰不可数名词；lots of fun，a lot of people等。

3.而a lot跟在动词后，作副词用，如：He bothered me a lot，Thanks a lot.

a lot of双语例句

I have lost a lot of weight.

我体重减了不少。

Is there a lot of effort and money going into this sort of research?

这种研究目前是否有大量的人力和资金投入？

I think a lot of people still underestimate him.

我觉得很多人仍然低估了他。

many双语例句

How many you?----I have.

你有多少条金鱼？---我有许多。

Yes but I have so many questions.

是的，但我有这么多的问题。

Many,but not all.

许多，但是不是全部。